JEE Chemistry Online Test S Block Elements Set E

1. Which of the following statement(s) is/are correct regarding Al and Be ?
(i) Both of these react with alkali.
(ii) There is diagonal relationship among these elements

2. Which of the following is/are not characteristic property(ies) of alkaline earth metals ?
(i) All alkaline earth metal oxides are basic in nature and forms sparingly soluble hydroxides with water.
(ii) The hydrated chlorides, bromides and iodies of Ca, Sr and Ba on heating undergoes hydrolysis while corresponding hydrated halides of Be and Mg on heating undergo dehydration.
(iii) Nitrates of alkaline earth metals decompose on heating as below

3. Which of the following statements are correct ?
(i) Copper - beryllium alloys are used in the preparation of high strength springs
(ii) Metallic beryllium is used for making window X-ray tubes.
(iii) Magnesium powder is used in incendiary bombs and singnals.
(iv) Barium is used in treatment of cancer.

4. Which of the following statement(s) is/are correct?
(i) The atomic and ionic radii of alkaline earth metals are smaller than those of the corresponding alkali metals in the same periods.
(ii) Second ionisation enthalpies of the alkaline earth metals are smaller than those of the corresponding alkali metals.
(iii) Compounds of alkaline earth metals are more extensively hydrated than those of alkali metals

5. Which of the following sequence of T and F is correct for given statements?
(i) The alkali metal hydroxides are the strongest of all bases.
(ii) All alkali metal halides have high negative enthalpies of formation.
(iii) The stability of the carbonates and hydrogen carbonates of alkali metals decrease with increase in electropositive character down the group.
(iv) Only LiHCO₃ exist as solid.

6. Which of the following statement(s) is/are correct regarding
Li₂CO₃ and Na₂CO₃ ?
(i) Sodium salt evolve CO₂ at higher temperature.
(ii) Polarization of Na⁺ is lesser than that of Li+.

7. Which of the following sequence of T and F is correct for alkali metals ? Here T represents True and F represents False statement.
(i) Alkali metal hydrides are ionic solids with high melting point.
(ii) All alkali halides are ionic in nature.
(iii) Li is the least powerful reducing agent and Na is the most powerful reducing agent.

8. Select the correct statements
(i) Cs⁺ is more highly hydrated that the other alkali metal ions
(ii) Among the alkali metals Li, Na, K and Rb, lithium has the highest melting point
(iii) Among the alkali metals only lithium forms a stable nitride by direct combination with nitrogen

9. Which of the following metal is found in green colouring pigment chlorophyll of plants?

10. Calcitonin and parathyroid hormone regulate concentration of which of the following element in plasma?

11. For a good quality cement what should be the ratio of following :
I. Silica to alumina
II. CaO to the total of oxides of SiO₂, Al₂O₃ and Fe₂O₃

12. Setting of cement is an

13. Which gas is released when CaCO₃ reacts with dilute HCl?

14. Mortar is a mixture of

15. Bone ash contains

16. The chemical which is used for plastering the broken bones is

17. The formula for calcium chlorite is

18. Dead burn plaster is

19. Plaster of Paris on making paste with little water sets to hard mass due to formation of

20. Gypsum on heating at 120 – 130°C gives